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This Table contains results of our analysis of an "interior" accuracy of CCD positional Numbered Minor Planets observations carried out in indication month of current year. The observatories taken into consideration are given with their MPC codes and instrumental equipment. A number of considered Numbered Minor Planets and their processed positions is given together with a mean error of a single observation for RA and DEC. Only one night observations were used for getting these errors.

A visitor may click required MPC code number (blue color) and see the first 100 Kb information as to detailed test of CCD positions made with this MPC code and sent to the MPC Database. These information tables show the (O-C) values for each observation.

If you find any inaccurate recording, please, send us a letter for correction.

Internal errors April, 2009
--------------------------------------------------------------------------------- MPC Country, Diam., Scale, Number Number Mean errors of code Observa- Focus FOV Cata- of minor of single observation tory (m) log planets positions RA DE --------------------------------------------------------------------------------- " " 012 Belgium, 0.85 45 x 30' 0.9" 42 335 0.571 0.479 Uccle 2.1 GSC 069 Baldone, 0.80 20 x 14' 0.6" 25 126 0.573 0.541 Riga, Latvia 2.4 USNO 071 Bulgaria, 0.50 28 x 18' 1.1" 2 10 0.827 0.526 National Obs. 1.7 GSC 106 Slovenia, 0.36 36 x 36' 2.0" 920 3780 0.335 0.336 Crni vrh 2.4 USNO 113 Germany, 0.50 13 x 10' 2" 5 23 0.380 0.286 Schonbrunn 2.3 USNO 114 Zelenchukskaya 0.3 No data 95 586 0.405 0.343 Station,Russia 2.4 UCAC 118 Slovakia, 0.57 14 x 10' 1.7" 4 25 0.095 0.058 Modra 3.3 USNO 127 Germany, 0.19 30 x 20' 2.4" 2 15 0.165 0.158 Bornheim 0.8 GSC 130 Italy, 0.4 15 x 10' 1.0" 1 4 0.434 0.106 Lumezzane 1.8 USNO 151 Switzerland, 0.25 24 x 16' 0.9" 2 6 0.048 0.141 Eschenberg 2.0 USNO 152 Lithuania 0.35 70 x 70' 4.1" 21 67 0.872 0.760 Moletai AO 1.2 GSC 185 Switzerland, 0.61 23 x 15' 0.9" 19 128 0.341 0.404 jur.-Vicques 2.1 USNO 194 Germany, 0.13 No data 1 3 0.216 0.030 Tivoli 0.8 USNO 198 Germany, 0.24 12 x 9' 2.0 16 74 0.231 0.239 Wildberg 2.4 USNO 212 Obs. La Dehesi- 0.26 No data 11 33 0.486 0.232 lla, Spain 2.6 GSC 232 Spain, Masqu- 0.25 13 x 9' 2.0" 1 3 0.211 0.225 efa Observ. 1.8 GSC 291 USA,Kitt Peak, 1.8 390 x 30' 1.0" 1105 3762 0.204 0.179 Spacewatch II 4.7 USNO 300 Japan, 0.5 78 x 78' 2.3" 44 173 0.448 0.515 Bisei Center 1.3 ACT 432 Australia, 0.20 No data 5 39 0.512 0.385 Boambee 1.0 ACT 443 Argentina, 0.15 134 x 92' photo 1 9 1.044 0.838 Obs. Plomer 1.0 ACT 448 USA, Desert 0.30 21 x 21' 2.4" 15 51 0.474 0.339 Moon Observat. 2.0 USNO 461 Hungary, JATE 0.60 28 x 19' 1.1" 64 263 0.225 0.208 Asteroid Surv. 1.8 USNO 467 New Zealand, 0.50 No data 1 3 0.046 0.076 Auckland Obs. 3.2 USNO 493 Spain, var. No data 131 447 0.144 0.168 Calar Alto USNO 510 Siegen, 0.30 No data 1 3 0.076 0.010 Germany 1.5 USNO 540 Austria, 0.60 20 x 15' 3.5" 2 10 0.915 0.601 Linz 1.5 GSC 544 Germany, 0.15 No data 1 5 0.288 0.641 W.Foer.Obs. 2.2 HIP. 557 Czech Rep., 0.65 20 x 13' 1.6" 13 167 0.155 0.137 Ondrejov 2.3 USNO 585 Kiev comet sta- 0.70 No data 5 25 0.593 0.504 tion, Ukraine 2.8 USNO 621 Germany, Ber- 0.60 11 x 10' 1.2" 112 489 0.280 0.309 gisch Gladbach 3.1 USNO 628 Germany, 0.20 18 x 12' 2.4" 1 19 0.173 0.065 Mulheim-Ruhr 1.2 GSC 673 USA, Table 0.61 22 x 22' 0.3" 8 25 0.021 0.024 Mountain 9.0 ACT 683 USA, Good- 0.36 20 x 20' 2.5" 441 1788 0.767 0.872 ricke-Pigott 4.0 GSC 688 USA, Lowell var. No data 3 47 0.075 0.067 Obs., AMS USNO 691 USA, 0.88 390 x 30' 1.1" 8330 47245 0.304 0.292 Spacewatch 4.6 USNO 703 USA, Catalina 0.41 175 x 175' 2.6" 19335 105103 0.575 0.534 Sky Survey 1.2 USNO 704 USA, 1.0 94 x 72' 2.2" 17076 101933 0.535 0.547 Lincoln Lab. 2.2 USNO 715 USA, 0.30 23 x 15' 1.8" 2 10 0.391 0.371 Las Cruces 1.0 USNO 735 USA, 0.46 No data 8 26 0.691 0.600 George Obs. USNO 807 USA, Cerro 4.0 37 x 37' 0.3" 5 22 0.022 0.031 Tololo 14.4 USNO 808 Argentina, 0.5 60 x 60' 0.8" 8 39 0.550 0.280 Carl.U.Cesco 3.8 USNO 850 USA, Cordell- 0.30 No data 6 20 0.551 0.383 Lorenz Obs. 1.7 GSC 950 UK, var. 31 155 0.295 0.231 La Palma USNO A13 Obs. Naef, 0.3 39 x 26' 1.6 15 57 0.314 0.433 Switzerland 1.2 UCAC A17 Guidestar Obs., 0.20 22 x 15' 1.8 10 30 0.488 0.417 Weinheim, Germ. 1.8 UCAC A20 Sogel, 0.25 11 x 8' 1.0 4 13 0.714 0.293 Germany 2.0 USNO A27 Eridanus Obs., 0.16 10 x 7' 2 1 6 0.321 0.311 Germany 1.1 USNO A32 Panker, 0.36 15 x 12' 2.6 10 31 0.504 0.594 Germany 1.9 USNO A37 Mueggelheim, 0.2 11 x 7' 1.8 8 46 0.560 0.416 Germany 2.0 USNO A44 Altschwendt, 0.30 17 x 13' 1.5 27 117 0.336 0.280 Austria 1.8 USNO A50 Andrushivka, 0.60 23 x 23' 1.4 289 1097 0.398 0.419 Ukraine 4.5 USNO A55 Osserv. di 0.40 19 x 19' 2.2 3 9 0.745 0.582 Borbona, Italy 1.8 USNO A74 Bergen-Enkh. 0.36 17 x 17' 0.8 1 8 0.088 0.146 Obs., Germany 1.8 UCAC A77 Obs. Chante- 0.20 27 x 20' 2.1 10 30 0.611 0.527 Perdrix,France 1.86 USNO A92 Urseanu Obs., 0.23 11 x 8' 1.6 2 13 0.450 1.056 Romania 1.5 USNO A94 Cormons, 0.36 18 x 12' 0.5 2 7 0.226 0.209 Italy 2.9 UCAC-2 B01 Taunus Obs., 0.6 62 x 42' 1.9 85 379 0.328 0.383 Germany 2.0 USNO B03 Alter Satz- 0.35 30 x 20' 1.8 3 10 0.514 0.388 berg, Austria 2.6 USNO B12 Koschny Obs., 0.40 44 x 44' 1.3 7 32 0.201 0.141 Netherlands 4.0 USNO B15 Inastars Obs., 0.36 No data 6 22 0.121 0.120 Germany USNO B21 Gaisberg Obs., 0.60 23 x 16' 0.9 25 92 0.212 0.243 Austria 2.0 USNO B36 Redshed Obs., 0.32 30 x 20' 1.4 3 12 9.844 2.959 Austria 1.6 USNO B42 Vitebsk, 0.3 11 x 8' 0.89 1 3 0.206 0.159 Belarus 1.5 USNO B50 Corner Obs., 0.20 12 x 9' 2.2 1 3 1.030 0.676 Germany 0.9 USNO B67 Stern. Mirast., 0.90 No data 13 48 0.339 0.359 Switzerland. 6.0 USNO B82 Maidbronn 0.30 No data 12 36 0.591 0.403 B84 Cyclops Obs., 0.30 No data 1 4 0.034 0.051 The Netherlands 1.1 USNO B93 Hoogeveen,The 0.15 102 x 68' 1.54 2 12 0.783 0.570 Netherlands 0.7 USNO B94 Petrozavodsk, 0.25 No data 7 21 0.335 0.263 Russia 2.0 UCAC B95 Achternholt, 0.20 No data 3 14 0.178 0.132 Germany 2.0 UCAC B96 Brixiis Obs., 0.28 15 x 10' 1.21 3 51 0.290 0.353 Belgium 2.8 USNO B99 Santa Coloma, 0.20 No data 3 18 0.112 0.106 Spain 1.9 UCAC D20 Zadko Obs., 1.0 23 x 24' 0.7 8 59 0.361 0.347 Australia 4.0 USNO D29 Purple Mount., 1.04 120 x 120' 1.7 5379 25446 0.377 0.361 China 1.8 UCAC D35 Lulin Observ., 1.0 12 x 11' 0.5 84 252 0.317 0.256 Taiwan 8.0 USNO E10 Spring Obs.-Fa- 2.0 No data 1 9 0.031 0.062 ulkes Tel. USNO E11 Frog Rock 0.32 No data 1 3 0.080 0.225 Obs.,Australia UCAC E12 Siding Spring 0.5 No data 3641 16957 0.409 0.385 Surv.,Australia UCAC E16 Grove Creek, 0.30 27 x 18' 1.1 1 6 0.086 0.029 Australia 3.0 GSC E85 Farm Cove, 0.35 14 x 9' 0.5 1 3 0.203 0.223 New Zealand 3.5 UCAC G56 Walnut Creek, 0.28 No data 3 10 0.432 0.234 USA 1.5 USNO G68 Sierra Stars 0.61 20 x 20' 0.8 16 74 0.290 0.362 Obs., USA 6.0 GSC-ACT G69 Thousand Oaks, 0.30 25 x 25' 1.8 10 93 0.393 0.399 U.S.A. 3.0 UCAC G84 Mount Lemmon 0.6 No data 24 87 0.227 0.166 SkyCenter,USA 4.7 USNO G89 Kachina Obs., 0.36 21 x 21' 1.2 2 9 0.059 0.024 Flagstaff,USA 4.0 UCAC G96 Mt. Lemmon 1.5 66 x 66' 1.0 20152 95914 0.278 0.212 Survey, U.S.A. f/2 UCAC G98 Calvin-Rehob. 0.41 22 x 14' 0.6 21 114 0.328 0.334 Obs., U.S.A. 3.4 USNO H06 New Mexico Ski- 0.25 56 x 37' 2.2 4 15 0.219 0.359 es Obs., Germ. 0.8 UCAC H10 Tzec Maun Obs., var. No data 53 231 0.441 0.372 U.S.A. USNO H26 Doc Greiner 0.40 No data 5 18 0.382 0.367 Res.Obs., USA 3.2 UCAC H47 Vicksburg, 0.3 No data 2 6 0.607 0.371 U.S.A. USNO H53 Thompsonville, 0.31 No data 6 78 0.725 0.467 U.S.A. 0.9 UCAC H55 Antares Obs. 0.40 21 x 21' 2.4 17 57 0.255 0.357 U.S.A. f/5.8 USNO I13 Washington 0.25 17 x 17' 2 11 37 0.226 0.335 DC, U.S.A. 5.0 UCAC I20 Rio Cuarto, 0.15 22 x 17' 2.1 2 6 0.699 0.519 Argentina 0.8 UCAC I21 El Condor Obs., 0.20 23 x 18' 2.2 7 24 0.470 0.296 Argentina 0.8 UCAC I32 Obs. Beta Orio- 0.25 17 x 12' 1.4 1 4 0.084 0.033 nis 1.4 UCAC I36 Obs. Los Campi- 0.20 20 x 13' 1.6 2 6 0.104 0.102 tos, Canuelas 1.2 UCAC J04 ESA Optical St. 1.0 No data 2 19 0.177 0.290 The Netherlands 4.4 UCAC J09 Balbriggan, 0.11 No data 4 32 0.085 0.119 Ireland 0.8 USNO J16 An Carraig Obs.,0.25 21 x 21' 1.2 2 6 0.084 0.199 North. Ireland 2.5 USNO J19 El Maestrat, 0.15 29 x 22 2.3 4 15 0.137 0.114 Spain 0.75 USNO J26 The Spaceguard 0.36 14 x 10' 1.1 5 15 0.241 0.375 Centre, Wales 2.3 USNO J27 El Guijo Obs., 0.20 16 x 16' 1.9 1 3 0.235 0.147 Madrid, Spain 2.1 UCAC J38 La Vara, 0.26 17 x 17' 2 8 27 0.217 0.301 Spain 2.0 USNO J40 Malaga, 0.20 17 x 12' 1.5 1 3 0.225 0.112 Spain 1.0 USNO J41 Raheny, 0.25 31 x 23' 1.3 3 9 0.732 0.301 Ireland 1.0 USNO J47 Obs. Nazaret, 0.20 No data 20 63 0.334 0.242 Spain 1.3 UCAC J51 Obs. Atlante, 0.2 42 x 28' 1.5 1 3 0.080 0.058 Tenerife,Spain 1.8 USNO J52 Obs. Pinsoro, 0.25 28 x 20' 2.3 1 3 0.146 0.147 Spain 0.8 USNO J75 OAM Obs., La 0.35 No data 5071 29473 0.402 0.375 Sagra, Spain f/6 UCAC J76 La Murta, 0.40 14 x 14' 1.6 4 12 0.302 0.480 Spain 2.6 USNO J93 Mount Tuffley 0.25 21 x 16' 1.7 3 24 0.288 0.250 Obs., England 1.4 USNO J94 Abbeydale, 0.2 16 x 10' 2 19 57 0.361 0.308 England 2.0 UCAC J95 Great Shefford, 0.30 25 x 25' 1.5 4 16 0.318 0.232 England 1.9 USNO

This Table contains results of our analysis of an "exterior" accuracy of CCD positional Numbered Minor Planets observations carried out in indication month of current year. The observatories taken into consideration are given with their MPC codes and instrumental equipment. A number of considered Numbered Minor Planets and their processed positions is given together with a mean error of a single observation for RA and DEC. Several close night observations were used for getting these errors. A visitor may click required MPC code number (blue color) and see the first 100 Kb information as to detailed test of CCD positions made with this MPC code and sent to the MPC Database. These information tables show the (O-C) values for each observation.

If you find any inaccurate recording, please, send us a letter for correction.

External errors April, 2009
--------------------------------------------------------------------------------- MPC Country, Diam., Scale, Number Number Mean errors of code Observa- Focus FOV Cata- of minor of single observation tory (m) log planets positions RA DE --------------------------------------------------------------------------------- " " 012 Belgium, 0.85 45 x 30' 0.9" 21 247 0.615 0.567 Uccle 2.1 GSC 069 Baldone, 0.80 20 x 14' 0.6" 14 99 0.674 0.601 Riga, Latvia 2.4 USNO 106 Slovenia, 0.36 36 x 36' 2.0" 12 96 0.328 0.320 Crni vrh 2.4 USNO 114 Zelenchukskaya 0.3 No data 18 215 0.445 0.355 Station,Russia 2.4 UCAC 118 Slovakia, 0.57 14 x 10' 1.7" 3 20 0.133 0.203 Modra 3.3 USNO 127 Germany, 0.19 30 x 20' 2.4" 1 11 0.223 0.289 Bornheim 0.8 GSC 152 Lithuania 0.35 70 x 70' 4.1" 4 20 1.499 0.966 Moletai AO 1.2 GSC 198 Germany, 0.24 12 x 9' 2.0 2 11 0.359 0.460 Wildberg 2.4 USNO 212 Obs. La Dehesi- 0.26 No data 1 5 0.514 0.600 lla, Spain 2.6 GSC 291 USA,Kitt Peak, 1.8 390 x 30' 1.0" 96 672 0.219 0.184 Spacewatch II 4.7 USNO 432 Australia, 0.20 No data 5 47 0.633 0.515 Boambee 1.0 ACT 443 Argentina, 0.15 134 x 92' photo 1 14 0.888 0.824 Obs. Plomer 1.0 ACT 448 USA, Desert 0.30 21 x 21' 2.4" 3 17 0.696 0.672 Moon Observat. 2.0 USNO 461 Hungary, JATE 0.60 28 x 19' 1.1" 22 147 0.258 0.224 Asteroid Surv. 1.8 USNO 557 Czech Rep., 0.65 20 x 13' 1.6" 10 155 0.199 0.139 Ondrejov 2.3 USNO 621 Germany, Ber- 0.60 11 x 10' 1.2" 38 272 0.325 0.272 gisch Gladbach 3.1 USNO 628 Germany, 0.20 18 x 12' 2.4" 1 21 0.166 0.165 Mulheim-Ruhr 1.2 GSC 682 USA, 0.25 23 x 15' 1.8" 1 4 0.540 0.663 Kanab 1.0 GSC 683 USA, Good- 0.36 20 x 20' 2.5" 172 1096 0.833 1.000 ricke-Pigott 4.0 GSC 688 USA, Lowell var. No data 1 22 0.099 0.095 Obs., AMS USNO 689 USA, USNO 1.55 No data 48 272 0.212 0.210 Flagstaff ACT 691 USA, 0.88 390 x 30' 1.1" 4189 34741 0.317 0.303 Spacewatch 4.6 USNO 703 USA, Catalina 0.41 175 x 175' 2.6" 5702 49759 0.575 0.568 Sky Survey 1.2 USNO 704 USA, 1.0 94 x 72' 2.2" 4861 49423 0.579 0.596 Lincoln Lab. 2.2 USNO 808 Argentina, 0.5 60 x 60' 0.8" 5 31 0.680 0.342 Carl.U.Cesco 3.8 USNO 850 USA, Cordell- 0.30 No data 1 4 0.209 0.832 Lorenz Obs. 1.7 GSC A13 Obs. Naef, 0.3 39 x 26' 1.6 5 25 0.224 0.539 Switzerland 1.2 UCAC A27 Eridanus Obs., 0.16 10 x 7' 2 1 6 0.305 0.280 Germany 1.1 USNO A32 Panker, 0.36 15 x 12' 2.6 1 5 0.304 0.413 Germany 1.9 USNO A37 Mueggelheim, 0.2 11 x 7' 1.8 3 25 0.777 0.373 Germany 2.0 USNO A44 Altschwendt, 0.30 17 x 13' 1.5 13 85 0.381 0.416 Austria 1.8 USNO A50 Andrushivka, 0.60 23 x 23' 1.4 11 68 0.478 0.550 Ukraine 4.5 USNO B01 Taunus Obs., 0.6 62 x 42' 1.9 6 42 0.444 0.269 Germany 2.0 USNO B12 Koschny Obs., 0.40 44 x 44' 1.3 3 21 0.253 0.221 Netherlands 4.0 USNO B21 Gaisberg Obs., 0.60 23 x 16' 0.9 8 46 0.291 0.294 Austria 2.0 USNO B67 Stern. Mirast., 0.90 No data 3 18 0.367 0.804 Switzerland. 6.0 USNO B93 Hoogeveen,The 0.15 102 x 68' 1.54 2 12 0.733 0.534 Netherlands 0.7 USNO B94 Petrozavodsk, 0.25 No data 4 29 0.310 0.211 Russia 2.0 UCAC B96 Brixiis Obs., 0.28 15 x 10' 1.21 3 51 0.271 0.363 Belgium 2.8 USNO D20 Zadko Obs., 1.0 23 x 24' 0.7 3 32 0.832 0.419 Australia 4.0 USNO D29 Purple Mount., 1.04 120 x 120' 1.7 726 6171 0.378 0.373 China 1.8 UCAC E12 Siding Spring 0.5 No data 709 5619 0.372 0.349 Surv.,Australia UCAC G68 Sierra Stars 0.61 20 x 20' 0.8 5 38 0.381 0.440 Obs., USA 6.0 GSC-ACT G69 Thousand Oaks, 0.30 25 x 25' 1.8 5 78 0.551 0.585 U.S.A. 3.0 UCAC G89 Kachina Obs., 0.36 21 x 21' 1.2 1 6 0.065 0.073 Flagstaff,USA 4.0 UCAC G96 Mt. Lemmon 1.5 66 x 66' 1.0 3329 28249 0.280 0.218 Survey, U.S.A. f/2 UCAC G98 Calvin-Rehob. 0.41 22 x 14' 0.6 7 58 0.348 0.308 Obs., U.S.A. 3.4 USNO H06 New Mexico Ski- 0.25 56 x 37' 2.2 2 9 0.362 0.478 es Obs., Germ. 0.8 UCAC H10 Tzec Maun Obs., var. No data 11 92 0.627 0.469 U.S.A. USNO H53 Thompsonville, 0.31 No data 4 66 0.677 0.413 U.S.A. 0.9 UCAC H55 Antares Obs. 0.40 21 x 21' 2.4 1 6 0.200 0.461 U.S.A. f/5.8 USNO I13 Washington 0.25 17 x 17' 2 63 292 0.390 0.357 DC, U.S.A. 5.0 UCAC I21 El Condor Obs., 0.20 23 x 18' 2.2 5 30 0.334 0.295 Argentina 0.8 UCAC J04 ESA Optical St. 1.0 No data 2 19 0.221 0.263 The Netherlands 4.4 UCAC J09 Balbriggan, 0.11 No data 4 32 0.104 0.112 Ireland 0.8 USNO J14 La Corte, Cana- 0.11 42 x 31' 3.8 12 48 0.484 0.391 ry Isl., Spain 0.4 USNO J16 An Carraig Obs.,0.25 21 x 21' 1.2 1 4 0.573 0.492 North. Ireland 2.5 USNO J38 La Vara, 0.26 17 x 17' 2 1 6 0.422 0.136 Spain 2.0 USNO J47 Obs. Nazaret, 0.20 No data 2 10 0.407 0.140 Spain 1.3 UCAC J75 OAM Obs., La 0.35 No data 2313 20798 0.395 0.372 Sagra, Spain f/6 UCAC J93 Mount Tuffley 0.25 21 x 16' 1.7 3 24 0.345 0.305 Obs., England 1.4 USNO J95 Great Shefford, 0.30 25 x 25' 1.5 2 12 0.280 0.159 England 1.9 USNO